Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 25,154	$ 46,462
Research and development credits	1,751	7,288
Stock-based compensation	1,295	848
Operating lease liabilities	583	382
Capitalized research & experimental expenditures	9,076
Deferred revenue	2,763
Other	474	73
Total gross deferred tax assets	41,096	55,053
Less: valuation allowance	(40,512)	(54,697)
Total deferred tax assets	584	356
Operating lease right-of-use assets	(584)	(356)
Total deferred tax liabilities	$ (584)	$ (356)